I've come into possession of a older model 1377 classic that doesn't fit into models that I have read on here. It has the cocking knob with the steel breech and sliding cover. It has the magnet to hold bbs and a rifled barreled. The grips on it were from a newer model, the grip frame has a more curved shape to it then the straight style. I am trying find the brown grips for it. Can anyone help?